Sevagoth, dark helmsmen

Whenever Sevagoth attacks, creatures you control
get lifelink until end of turn.

Gloom—{t}: Put a stun counter on target creature
you do not control, proliferate.

Exalted shadow—{p/b}{p/b}: create a legendary 1/1
black Shadow creature with haste, shroud and
"when this creature attacks, proliferate", it enters
with a +1/+1 counter on it.